Update README.md

README.md

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 # Euonia
 Euonia development framework and toolkit library for .NET application/service. Powered by Nerosoft.
 
+The word "eunoia" refers to a concept derived from the ancient Greek language. It is a term that signifies a state of goodwill, beautiful thinking, and a well-disposed mind. The word "eunoia" combines the prefix "eu," meaning "good" or "well," and "noos," meaning "mind" or "thinking." It encompasses the idea of having a positive mindset, open-heartedness, and a sincere attitude towards others. Eunoia can be seen as a virtue that promotes harmony, empathy, and generosity in interpersonal relationships. It is often associated with the ideal of achieving inner peace and fostering harmonious connections with others.
+
+# Projects
+
+## Diagram
+
+```mermaid
+graph TD;
+	Euonia.Modularity --> Euonia.Core
+	Euonia.Hosting --> Euonia.Modularity
+
+	Euonia.Threading.ZooKeeper --> Euonia.Threading
+	Euonia.Threading.Redis --> Euonia.Threading
+	Euonia.Euonia.Threading.FileSystem --> Euonia.Threading
+	Euonia.Threading.Azure --> Euonia.Threading
+	Euonia.Threading --> Euonia.Core
+	
+	Euonia.Mapping.Mapster --> Euonia.Mapping
+	Euonia.Mapping.Automapper --> Euonia.Mapping
+	
+	Euonia.Repository.Mongo --> Euonia.Repository
+	Euonia.Repository.EfCore --> Euonia.Repository
+	Euonia.Repository --> Euonia.Domain
+	Euonia.Repository --> Euonia.Modularity
+	Euonia.Domain --> Euonia.Linq
+	Euonia.Domain --> Euonia.Core
+	
+	Euonia.Application --> Euonia.Bus
+	Euonia.Application --> Euonia.Pipeline
+	Euonia.Application --> Euonia.Validation
+	Euonia.Bus --> Euonia.Domain
+	Euonia.Bus --> Euonia.Modularity
+	Euonia.Bus.InMemory --> Euonia.Bus
+	Euonia.Bus.RabbitMq --> Euonia.Bus
+	
+	Euonia.Caching.Memory --> Euonia.Caching
+	Euonia.Caching.Runtime --> Euonia.Caching
+	Euonia.Caching.Redis --> Euonia.Caching
+	
+```
+
+## Core module
+- [Euonia.Core](/Source/Euonia.Core)
+  > Core library for Euonia framework.
+- [Euonia.Business](/Source/Euonia.Business)
+  > Object oriented & scalable business library.
+- [Euonia.Grpc](/Source/Euonia.Grpc)
+
+  > Grpc library for Euonia framework.
+- [Euonia.Hosting](/Source/Euonia.Hosting)
+  > A library that helps developer to build a host for .NET application/service quickly.
+- [Euonia.Linq](/Source/Euonia.Linq)
+  > Toolkit library for LINQ.
+- [Euonia.Modularity](/Source/Euonia.Modularity)
+  > To be added.
+- [Euonia.Pipeline](/Source/Euonia.Pipeline)
+  > To be added.
+- [Euonia.Validation](/Source/Euonia.Validation)
+  > Used Euonia.Validation to.
+
+## Caching module
+- [Euonia.Caching](/Source/Euonia.Caching)
+  > Defines abstract classes & interfaces for caching service.
+- [Euonia.Caching.Redis](/Source/Euonia.Caching.Redis)
+  > Implements ICachingService with Redis.
+- [Euonia.Caching.Memory](/Source/Euonia.Caching.Memory)
+  > Implements ICachingService with *Microsoft.Extensions.Caching.Memory*.
+- [Euonia.Caching.Runtime](/Source/Euonia.Caching.Runtime)
+
+  > Implements ICachingService with build-in *System.Runtime.Caching*.
+
+## Domain Driven Design module
+- [Euonia.Application](/Source/Euonia.Application)
+  > Defines abstract application service classes & interfaces.
+- [Euonia.Domain](/Source/Euonia.Domain)
+  > Defines abstract domain service classes & interfaces.
+- [Euonia.Repository](/Source/Euonia.Repository)
+  > Defines abstract repository classes & interfaces.
+- [Euonia.Repository.EfCore](/Source/Euonia.Repository.EfCore)
+  > Implements IRepository with Entity Framework Core.
+- [Euonia.Repository.Mongo](/Source/Euonia.Repository.Mongo)
+  > Implements IRepository with MongoDB.
+
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